measure temp and upload

nodemcu_upload_temp_measurements.cpp

#include <Wire.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <limits>
#include <ArduinoJson.h>
#include <ESP8266HTTPClient.h>

#include <SPI.h>
#include <Adafruit_BME280.h>

#ifndef STASSID
#define STASSID “xxx”
#define STAPSK  “xx”x
#endif

const char* ssid = STASSID;
const char* password = STAPSK;

ESP8266WebServer server(80);

int D0 = 16;
int D1 = 5;
int D2 = 4;
int D3 = 0;
int D4 = 2;
int D5 = 14;
int D6 = 12;
int D7 = 13;
int D8 = 15;
int RX = 3;

Adafruit_BME280 *bme;
static float lastTemperature = std::numeric_limits<float>::infinity();

void setup() {
  Serial.begin(9600);
  Wire.begin(D2, D1);

  bme = new Adafruit_BME280();
  bool status = bme->begin(0x76, &Wire);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  if (status == false) {
    Serial.print("SensorID was: 0x");
    Serial.println(bme->sensorID(), 16);
    while (1) {
      yield();
    }
  }

  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(400);
  }

  String status1 = String("IP:" + WiFi.localIP().toString() + "     ");
  Serial.println(status1);

  if (MDNS.begin("esp8266_temp")) {
    Serial.println("connected          ");
  } else {
    Serial.println("MDNS failed          ");
    delay(2000);
  }

  server.on("/", handleRoot);
  server.begin();
}

void handleRoot() {
  String tempString = String(lastTemperature, 3);
  String d = String("It's " + tempString + " C here!");

  if (lastTemperature == std::numeric_limits<float>::infinity()) {
    d = String("no measurements done yet");
  }

  //  digitalWrite(led, 1);
  server.send(200, "text/plain", d);
  //  digitalWrite(led, 0);
}


// the loop function runs over and over again forever
void loop() {
//  ESP.deepSleep(200e6); // 20e6 is 20 microseconds
  delay(15000); // Pause for 15 seconds

  float temp = bme->readTemperature();

  if (isnan(temp) == false) {
    lastTemperature = temp;

    String tempString = String(temp, 2);
    String d = String(tempString + " 'C    ");

    Serial.println(d);

    // send HTTP request
    String requestURL =  urlWithLastTemperature(temp);
    HTTPClient http;

    // Your Domain name with URL path or IP address with path
    http.begin(requestURL.c_str());

    // Send HTTP GET request
    int httpResponseCode = http.GET();

    if (httpResponseCode != 200) {
      Serial.println("response code: "+httpResponseCode);
    }


  } else {
    Serial.println("temp fail! ");
  }
  server.handleClient();
  MDNS.update();
}

String urlWithLastTemperature(float lastTemp) {
  String url = String("http://foobar/insert_temp.php?temp=" + String(lastTemp, 2));

  return url;
}